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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web : http://www.circuitsathome.com
e-mail : support@circuitsathome.com
*/
#include "cdcacm.h"

const uint8_t ACM::epDataInIndex = 1;
const uint8_t ACM::epDataOutIndex = 2;
const uint8_t ACM::epInterruptInIndex = 3;

ACM::ACM(USB *p, CDCAsyncOper *pasync) :
pUsb(p),
pAsync(pasync),
bAddress(0),
qNextPollTime(0),
bPollEnable(false),
bControlIface(0),
bDataIface(0),
bNumEP(1),
ready(false)
{
for(uint8_t i=0; i<ACM_MAX_ENDPOINTS; i++)
{
epInfo[i].epAddr = 0;
epInfo[i].maxPktSize = (i) ? 0 : 8;
epInfo[i].epAttribs = 0;
epInfo[i].bmNakPower = USB_NAK_NOWAIT;
    //epInfo[i].bmNakPower = USB_NAK_MAX_POWER;
    
if (!i)
epInfo[i].bmNakPower = USB_NAK_MAX_POWER;

}
if (pUsb)
pUsb->RegisterDeviceClass(this);
}

uint8_t ACM::Init(uint8_t parent, uint8_t port, bool lowspeed)
{
const uint8_t constBufSize = sizeof(USB_DEVICE_DESCRIPTOR);

uint8_t buf[constBufSize];
uint8_t rcode;
UsbDevice *p = NULL;
EpInfo *oldep_ptr = NULL;
uint8_t num_of_conf; // number of configurations

AddressPool &addrPool = pUsb->GetAddressPool();

USBTRACE("ACM Init\r\n");

if (bAddress)
return USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE;

// Get pointer to pseudo device with address 0 assigned
p = addrPool.GetUsbDevicePtr(0);

if (!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;

if (!p->epinfo)
{
USBTRACE("epinfo\r\n");
return USB_ERROR_EPINFO_IS_NULL;
}

// Save old pointer to EP_RECORD of address 0
oldep_ptr = p->epinfo;

// Temporary assign new pointer to epInfo to p->epinfo in order to avoid toggle inconsistence
p->epinfo = epInfo;

p->lowspeed = lowspeed;

// Get device descriptor
rcode = pUsb->getDevDescr( 0, 0, constBufSize, (uint8_t*)buf );

// Restore p->epinfo
p->epinfo = oldep_ptr;

if( rcode )
goto FailGetDevDescr;

// Allocate new address according to device class
bAddress = addrPool.AllocAddress(parent, false, port);

if (!bAddress)
return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;

// Extract Max Packet Size from the device descriptor
epInfo[0].maxPktSize = (uint8_t)((USB_DEVICE_DESCRIPTOR*)buf)->bMaxPacketSize0;

// Assign new address to the device
rcode = pUsb->setAddr( 0, 0, bAddress );

if (rcode)
{
p->lowspeed = false;
addrPool.FreeAddress(bAddress);
bAddress = 0;
USBTRACE2("setAddr:",rcode);
return rcode;
}

USBTRACE2("Addr:", bAddress);

p->lowspeed = false;

p = addrPool.GetUsbDevicePtr(bAddress);

if (!p)
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;

p->lowspeed = lowspeed;

num_of_conf = ((USB_DEVICE_DESCRIPTOR*)buf)->bNumConfigurations;

// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, 1, epInfo);

if (rcode)
goto FailSetDevTblEntry;

USBTRACE2("NC:", num_of_conf);

for (uint8_t i=0; i<num_of_conf; i++)
{
ConfigDescParser< USB_CLASS_COM_AND_CDC_CTRL,
CDC_SUBCLASS_ACM,
CDC_PROTOCOL_ITU_T_V_250,
CP_MASK_COMPARE_CLASS |
CP_MASK_COMPARE_SUBCLASS |
CP_MASK_COMPARE_PROTOCOL> CdcControlParser(this);

ConfigDescParser<USB_CLASS_CDC_DATA, 0, 0,
CP_MASK_COMPARE_CLASS> CdcDataParser(this);

rcode = pUsb->getConfDescr(bAddress, 0, i, &CdcControlParser);
rcode = pUsb->getConfDescr(bAddress, 0, i, &CdcDataParser);

if (bNumEP > 1)
break;
} // for

if (bNumEP < 4)
return USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED;

// Assign epInfo to epinfo pointer
rcode = pUsb->setEpInfoEntry(bAddress, bNumEP, epInfo);

USBTRACE2("Conf:", bConfNum);

// Set Configuration Value
rcode = pUsb->setConf(bAddress, 0, bConfNum);

if (rcode)
goto FailSetConf;

rcode = pAsync->OnInit(this);

if (rcode)
goto FailOnInit;

USBTRACE("ACM configured\r\n");
ready = true;

//bPollEnable = true;

//USBTRACE("Poll enabled\r\n");
return 0;

FailGetDevDescr:
USBTRACE("getDevDescr:");
goto Fail;

FailSetDevTblEntry:
USBTRACE("setDevTblEn:");
goto Fail;

FailGetConfDescr:
USBTRACE("getConf:");
goto Fail;

FailSetConf:
USBTRACE("setConf:");
goto Fail;

FailOnInit:
USBTRACE("OnInit:");
goto Fail;

Fail:
Serial.println(rcode, HEX);
Release();
return rcode;
}


void ACM::EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *pep)
{
//ErrorMessage<uint8_t>(PSTR("Conf.Val"), conf);
//ErrorMessage<uint8_t>(PSTR("Iface Num"),iface);
//ErrorMessage<uint8_t>(PSTR("Alt.Set"), alt);

bConfNum = conf;

uint8_t index;

if ((pep->bmAttributes & 0x03) == 3 && (pep->bEndpointAddress & 0x80) == 0x80)
index = epInterruptInIndex;
else
if ((pep->bmAttributes & 0x02) == 2)
index = ((pep->bEndpointAddress & 0x80) == 0x80) ? epDataInIndex : epDataOutIndex;
else
return;

// Fill in the endpoint info structure
epInfo[index].epAddr = (pep->bEndpointAddress & 0x0F);
epInfo[index].maxPktSize = (uint8_t)pep->wMaxPacketSize;
//epInfo[index].epAttribs = 0;

bNumEP ++;

//PrintEndpointDescriptor(pep);
}

uint8_t ACM::Release()
{
pUsb->GetAddressPool().FreeAddress(bAddress);

bControlIface = 0;
bDataIface = 0;
bNumEP = 1;

bAddress = 0;
qNextPollTime = 0;
bPollEnable = false;
ready = false;
return 0;
}

uint8_t ACM::Poll()
{
uint8_t rcode = 0;

if (!bPollEnable)
return 0;

//uint32_t time_now = millis();

//if (qNextPollTime <= time_now)
//{
// qNextPollTime = time_now + 100;

// uint8_t rcode;
// const uint8_t constBufSize = 16;
// uint8_t buf[constBufSize];

// for (uint8_t i=0; i<constBufSize; i++)
// buf[i] = 0;

// uint16_t read = (constBufSize > epInfo[epInterruptInIndex].maxPktSize)
// ? epInfo[epInterruptInIndex].maxPktSize : constBufSize;
// rcode = pUsb->inTransfer(bAddress, epInfo[epInterruptInIndex].epAddr, &read, buf);

// if (rcode)
// return rcode;

// for (uint8_t i=0; i<read; i++)
// {
// PrintHex<uint8_t>(buf[i]);
// Serial.print(" ");
// }
// USBTRACE("\r\n");
//}
return rcode;
}

uint8_t ACM::RcvData(uint16_t *bytes_rcvd, uint8_t *dataptr)
{
return pUsb->inTransfer(bAddress, epInfo[epDataInIndex].epAddr, bytes_rcvd, dataptr);
}

uint8_t ACM::SndData(uint16_t nbytes, uint8_t *dataptr)
{
return pUsb->outTransfer(bAddress, epInfo[epDataOutIndex].epAddr, nbytes, dataptr);
}

/* untested */
uint8_t ACM::GetNotif( uint16_t *bytes_rcvd, uint8_t *dataptr )
{
  return pUsb->inTransfer(bAddress, epInfo[epInterruptInIndex].epAddr, bytes_rcvd, dataptr);
}

uint8_t ACM::SetCommFeature(uint16_t fid, uint8_t nbytes, uint8_t *dataptr)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCOUT, CDC_SET_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, nbytes, nbytes, dataptr, NULL ));
}

uint8_t ACM::GetCommFeature(uint16_t fid, uint8_t nbytes, uint8_t *dataptr)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCIN, CDC_GET_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, nbytes, nbytes, dataptr, NULL ));
}

uint8_t ACM::ClearCommFeature(uint16_t fid)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCOUT, CDC_CLEAR_COMM_FEATURE, (fid & 0xff), (fid >> 8), bControlIface, 0, 0, NULL, NULL ));
}

uint8_t ACM::SetLineCoding(const LINE_CODING *dataptr)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCOUT, CDC_SET_LINE_CODING, 0x00, 0x00, bControlIface, sizeof(LINE_CODING), sizeof(LINE_CODING), (uint8_t*)dataptr, NULL ));
}

uint8_t ACM::GetLineCoding(LINE_CODING *dataptr)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCIN, CDC_GET_LINE_CODING, 0x00, 0x00, bControlIface, sizeof(LINE_CODING), sizeof(LINE_CODING), (uint8_t*)dataptr, NULL ));
}

uint8_t ACM::SetControlLineState(uint8_t state)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCOUT, CDC_SET_CONTROL_LINE_STATE, state, 0, bControlIface, 0, 0, NULL, NULL ));
}

uint8_t ACM::SendBreak(uint16_t duration)
{
return( pUsb->ctrlReq( bAddress, 0, bmREQ_CDCOUT, CDC_SEND_BREAK, (duration & 0xff), (duration >> 8), bControlIface, 0, 0, NULL, NULL ));
}


void ACM::PrintEndpointDescriptor( const USB_ENDPOINT_DESCRIPTOR* ep_ptr )
{
Notify(PSTR("Endpoint descriptor:"));
Notify(PSTR("\r\nLength:\t\t"));
PrintHex<uint8_t>(ep_ptr->bLength);
Notify(PSTR("\r\nType:\t\t"));
PrintHex<uint8_t>(ep_ptr->bDescriptorType);
Notify(PSTR("\r\nAddress:\t"));
PrintHex<uint8_t>(ep_ptr->bEndpointAddress);
Notify(PSTR("\r\nAttributes:\t"));
PrintHex<uint8_t>(ep_ptr->bmAttributes);
Notify(PSTR("\r\nMaxPktSize:\t"));
PrintHex<uint16_t>(ep_ptr->wMaxPacketSize);
Notify(PSTR("\r\nPoll Intrv:\t"));
PrintHex<uint8_t>(ep_ptr->bInterval);
Notify(PSTR("\r\n"));
}
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